Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 4,605	$ 4,385
Investments	8,753	8,520
Accounts receivable, net	4,863	5,154
Inventories, net	3,562	3,223
Prepaid expenses and other current assets	740	653
Total current assets	22,523	21,935
Long-term investments		500
Equipment, furniture and leasehold improvements, net	8,222	8,099
Other assets	122	124
Deferred tax asset	8,881	8,881
Total assets	39,748	39,539
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	908	955
Accrued expenses	2,308	2,548
Other current liabilities	374	409
Total current liabilities	3,590	3,912
Commitments and contingencies (Note 8)
Shareholders' equity:
Preferred stock, $.001 par value: authorized 10,000,000 shares: Series B Convertible Preferred stock, (liquidation preference of $5,659,000) stated value $1,000 per share, $.001 par value: 10,000 shares designated and 5,659 issued and outstanding as of June 30, 2013 and December 31, 2012
Common stock, $.001 par value: authorized 200,000,000 shares, issued and outstanding, 23,838,156 shares as of June 30, 2013 and 23,674,541 as of December 31, 2012	24	24
Additional paid in capital	224,910	223,575
Accumulated deficit	(188,313)	(187,509)
Treasury stock, 150,000 shares as of June 30, 2013 and December 31, 2012	(463)	(463)
Total shareholders' equity	36,158	35,627
Total liabilities and shareholders' equity	$ 39,748	$ 39,539